<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <input type="checkbox" v-model="checked" value="html" id="html"/>
    <label for="html">HTML</label>
    <br/>
    <input type="checkbox" v-model="checked" value="js" id="js"/>
    <label for="js">js</label>
    <br/>
    <input type="checkbox" v-model="checked" value="css" id="css"/>
    <label for="css">css</label>
    <br/>
    <p>choose radio is {{checked}}</p>

</div>

<!--  <script src="E:\idea_workspace\study\vue\vue.min.js"></script>-->
<script src="https://unpkg.com/vue/dist/vue.min.js"></script>

<script>
    var app = new Vue({
        el: '#app',
        data: {
            checked: ['html','css']
        },

    })
</script>

</body>
</html>